/*
 * Galaxium Messenger
 * 
 * Copyright (C) 2008 Paul Burton <paulburton89@gmail.com>
 * 
 * License: GNU General Public License (GPL)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

using System;

namespace LibMimic
{
	public class MimicDecoder : MimicBase
	{
		bool _initialized;
		uint _bufferSize;
		
		public unsafe int Width
		{
			get
			{
				int width;
				
				if (!MimicInterop.mimic_get_property (Context, "width", &width))
				{
					Console.WriteLine ("Unable to get width");
					return -1;
				}
				
				return width;
			}
		}
		
		public unsafe int Height
		{
			get
			{
				int height;
				
				if (!MimicInterop.mimic_get_property (Context, "height", &height))
				{
					Console.WriteLine ("Unable to get height");
					return -1;
				}
				
				return height;
			}
		}
		
		public MimicDecoder ()
		{
		}
		
		public unsafe byte[] Decode (byte[] data)
		{
			if (!_initialized)
			{
				if (!MimicInterop.mimic_decoder_init (Context, data))
				{
					Console.WriteLine ("Unable to initialize libmimic decoder");
					return new byte[0];
				}
				
				fixed (uint *bufferSizePtr = &_bufferSize)
				{
					if (!MimicInterop.mimic_get_property (Context, "buffer_size", bufferSizePtr))
					{
						Console.WriteLine ("Unable to get buffer size");
						return new byte[0];
					}
				}
				
				Console.WriteLine ("Initialized, buffer size {0}", _bufferSize);
				
				_initialized = true;
			}
			
			byte[] output = new byte[_bufferSize];
			
			fixed (byte *dataPtr = data, outPtr = output)
			{
				if (!MimicInterop.mimic_decode_frame (Context, dataPtr, outPtr))
				{
					Console.WriteLine ("Unable to decode frame");
					return new byte[0];
				}
			}
			
			return output;
		}
	}
}
